Quote:
Originally Posted by Regulus
Greg the Samyang is a popular lens by all reports. However I have no personal experience of it.
However the Distagon is excellent, and although it is many years since I had a collection of Zeiss lenses I wouldn't hesitate to buy another of the older models, and am casting around for some old primes in the 28/35/100/200 size range.
I wish I could find an EOS adapter for my Zeiss 100 f2.8 that is with the Werra lens set. It is beautifully sharp with great colour.
Another lens I liked was the Kiron 24mm f2. The were an independent lens maker in Japan that also made quality laboratory optics. Back story is that designs were done by ex-nikon lens makers. Thus the name: Nikkor/Kiron [better than Kirkon or Kironk I suppose :-) ]
I am in favour of some of the Konica Hexanon range of primes also.
For what it's worth. Trev
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Thanks Trev. The Kiron sounds interesting. I know about the Samyang. The main issue with it apart from getting a good copy, is moustache distortion. I read somewhere a version 111 is being released with the distortion addressed but can't find anything to substantiate that.
Quote:
Originally Posted by skysurfer
I am also considering this lens, instead of a Canon 17-40mm f/4L, reports tell it should be a good quality. It lacks AF and automatic aperture control, but for the more advanced (astro)photographer that should not be an issue. It works even of Fullframe bodies.
Do some more people have experience with this lens ?
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You usually do not use AF or in camera aperture control on nightscapes as you are imaging in the dark and these things don't work. Usual setting would be 30 seconds and ISO3200/6400 and wide open. Some lenses have bad chromatic aberrations or are very soft wide open so they require stopping down to F4 of F5.6. Then that requires a longer exposure to compensate. That then requires tracking to maintain round stars. So that's really the crux of the problem. You need a low noise ISO6400 camera and an F2.8 lens of short focal length with low chromatic aberrations and low coma and little distortion.
That then becomes practically no lens. Nikon 14-24 is one but its heavy and expensive and can't take filters without expensive and large after market filter holders.
I have been doing some more research on this and here are some possible lenses that will work:
1. Canon FD 20m F2.8 (I have one on the way to me). There is also a 17mm F4.
2. Minolta Rokkor 20mm and 21mm F2.8.
3. Leica Elmarit 19mm F2.8 (more expensive but inder $1000 2nd hand) No idea about chromatic aberrations but distortion seems low.
4. Zeiss Contax (Yashica mount) makes a 21mm and I think a 17mm or 19mm. Likely to be very good but chromatic aberration would be the thing I would want to know if its ok or not.
In the film days 24-28mm was considered wide angle lens. So 20mm is rare and under 20mm is even rarer.
Greg.